JPS62289237A - Carrier for catalytic combustion - Google Patents
Carrier for catalytic combustionInfo
- Publication number
- JPS62289237A JPS62289237A JP13310086A JP13310086A JPS62289237A JP S62289237 A JPS62289237 A JP S62289237A JP 13310086 A JP13310086 A JP 13310086A JP 13310086 A JP13310086 A JP 13310086A JP S62289237 A JPS62289237 A JP S62289237A
- Authority
- JP
- Japan
- Prior art keywords
- carrier
- catalyst
- honeycomb
- coated
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007084 catalytic combustion reaction Methods 0.000 title claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 55
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims abstract description 5
- 239000000919 ceramic Substances 0.000 claims abstract description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000000576 coating method Methods 0.000 abstract description 18
- 239000011248 coating agent Substances 0.000 abstract description 16
- 238000002485 combustion reaction Methods 0.000 abstract description 14
- 239000006255 coating slurry Substances 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 230000001112 coagulating effect Effects 0.000 abstract 1
- 230000008021 deposition Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 241000264877 Hippospongia communis Species 0.000 description 30
- 239000010410 layer Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000004931 aggregating effect Effects 0.000 description 3
- 229910052878 cordierite Inorganic materials 0.000 description 3
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- -1 aluminate titanate Chemical class 0.000 description 1
- JLDSOYXADOWAKB-UHFFFAOYSA-N aluminium nitrate Chemical group [Al+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O JLDSOYXADOWAKB-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Landscapes
- Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
（産業上の利用分野）
本発明は触媒燃焼用担体に係り、特に触媒の活性低下を
防止し信頼性を向上させるのに好適なハニカム触媒担体
に関する。Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a carrier for catalytic combustion, and in particular to a honeycomb catalyst suitable for preventing a decrease in catalyst activity and improving reliability. Regarding the carrier.
（従来の技術）
触媒燃焼装置は、燃料ガスと空気の混合気体を、例えば
燃焼ガスの流路内に設けられた触媒に接触させて燃焼さ
せるもので、従来のバーナ式の燃焼装置と比較すると、
次のような特徴を有する。(Prior Art) A catalytic combustion device burns a mixture of fuel gas and air by bringing it into contact with, for example, a catalyst provided in a combustion gas flow path, and compared to a conventional burner-type combustion device, ,
It has the following characteristics.
（１）燃焼温度を１０００℃以下に制御可能なため、Ｎ
Ｏｘの生成や起動停止時の未燃分が少ない。(1) Since the combustion temperature can be controlled to below 1000℃, N
There is less oxygen generation and unburned matter during start and stop.
（２）バーナでは燃焼できないような低品位ガス（例え
ば高炉ガス（Ｃ０分０．５ Ｖ ｏ １％））でも燃焼
可能である。このため家庭用ガスストーブ、排熱回収ボ
イラ等への適用が進められている。(2) Even low-grade gas that cannot be combusted in a burner (for example, blast furnace gas (C0 min 0.5 V o 1%)) can be combusted. For this reason, it is being applied to household gas stoves, waste heat recovery boilers, etc.
この装置の心臓部である燃焼触媒としては、耐熱性に優
れたセラミック製ハニカム（蜂巣形状体）に担持された
ものが多く用いられている。これは表面積が大きく、高
価な触媒の利用効率が高い上、混合気の圧損が小さいた
めである。またその材質としては、熱膨張率が小さく、
熱応力によるハニカムの破損が少ないコーディエライト
、ムライト、チタン酸アルミネート等が多く用いられて
いる。しかしながら、これらの材料はいずれも担体自体
の比表面積が小さいため、直接触媒を担持させてもハニ
カム全体の活性度が低いという欠点がある。そこでこれ
らのハニカム表面上にβ−Ａ１２０３やγ−Ａ１２０３
等の高比表面積を有する触媒担持層を担体重量の１５〜
３０ｗｔ％被覆することによりハニカムの見掛けの比表
面積を高くし活性度を上げることが一般に行なわれてい
る。The combustion catalyst, which is the heart of this device, is often supported on a ceramic honeycomb with excellent heat resistance. This is because the surface area is large, the efficiency of using an expensive catalyst is high, and the pressure drop of the air-fuel mixture is small. In addition, the material has a low coefficient of thermal expansion,
Cordierite, mullite, aluminate titanate, etc. are often used because the honeycomb is less susceptible to damage due to thermal stress. However, since each of these materials has a small specific surface area of the carrier itself, there is a drawback that the overall activity of the honeycomb is low even if the catalyst is directly supported. Therefore, β-A1203 and γ-A1203 are coated on the surface of these honeycombs.
A catalyst supporting layer having a high specific surface area such as
It is generally practiced to increase the apparent specific surface area of the honeycomb and increase the activity by coating it with 30 wt%.
しかし、この触媒担持層の被覆が不均一な場合はハニカ
ム上濃縮濃度にむらを生じ、燃焼むらの原因となるため
、燃焼中のハニカムに熱応力が発生したり、触媒濃度の
高い部分が過熱して活性低下を起こすという問題を生じ
る。However, if the coating of this catalyst support layer is uneven, the concentration on the honeycomb will be uneven, causing uneven combustion, resulting in thermal stress occurring in the honeycomb during combustion, or overheating in areas with high catalyst concentration. This results in a problem of decreased activity.
したがって信頼性を要求される燃焼装置の性格上、均一
な触媒担持層を有するハニカム担体が触媒燃焼装置の重
要なポイントとなっている。Therefore, due to the characteristics of a combustion device that requires reliability, a honeycomb carrier having a uniform catalyst support layer is an important point in a catalytic combustion device.
ハニカム担体に担持層を１５〜３Ｑｗｔ％コーティング
する際、コーテイング材の濃度の高いスラリを用いれば
、少ないコーティング回数で所定量のコーテイング量が
得られ、コスト的に有利であるが、粘度が高くセル中に
残留するスラリ量が多いため、セルの閉塞を生じ易く、
またノ＼ニカムへの付着も不均一となる。When coating a honeycomb carrier with a carrier layer of 15 to 3 Qwt%, if a slurry with a high concentration of coating material is used, a predetermined amount of coating can be obtained with a small number of coatings, which is advantageous in terms of cost, but the viscosity is high and the cell Due to the large amount of slurry remaining inside, cell blockage is likely to occur.
Also, the adhesion to the nicum becomes uneven.
そこで一般に均一な触媒担持層を得るには、ノ１ニカム
担体に担持層をコーティングする際、コーテイング材の
濃度の低いスラリを用い、繰返しコーティングする方法
が使用されるが、単に製造工程が複雑化するだけでなく
、再度コーティングする際、前回付着したコーティング
屓が剥離し易く、均一にコーティングすることは困難で
あった。Generally, in order to obtain a uniform catalyst support layer, a method is used in which a slurry with a low concentration of coating material is used and repeated coatings are used when coating the support layer on a nicum carrier, but this simply complicates the manufacturing process. Not only that, but when recoating, the previously applied coating layer was likely to peel off, making it difficult to coat uniformly.
第５図は、従来の製造法になるハニカムの１３ａ−βＡ
β２０３の濃度分布を示したものである。Figure 5 shows the 13a-βA honeycomb produced by the conventional manufacturing method.
It shows the concentration distribution of β203.
（発明が解決しようとする問題点）
上記従来技術においては、触媒担体への触媒担持層を形
成するコーティングの際、希薄なコーティングスラリ中
のコーテイング材と触媒担体との間の付着性が配慮され
ておらず、触媒担持層の付着が不均一になるという問題
があった。(Problems to be Solved by the Invention) In the above conventional technology, when coating a catalyst carrier to form a catalyst support layer, consideration is given to the adhesion between the coating material in the dilute coating slurry and the catalyst carrier. Therefore, there was a problem that the adhesion of the catalyst supporting layer became non-uniform.
本発明の目的は、触媒担体と触媒担持層を形成するスラ
リ間の付着性を改善し、触媒担体に触媒担持層を均一に
被覆し得る触媒燃焼用担体を提供することにある。An object of the present invention is to provide a carrier for catalytic combustion that can improve the adhesion between the catalyst carrier and the slurry forming the catalyst carrier layer and uniformly cover the catalyst carrier with the catalyst carrier layer.
（問題点を解決するための手段）
上記目的は、触媒担持層をコーティングする前の担体に
、硝酸アルミニウム等の凝集作用を有する物質を含浸ま
たは被覆し、担体表面にコーティングスラリの凝集作用
を持たせることにより、達成される。すなわち、本発明
は、触媒担体表面に高比表面積のセラミックス触媒担持
層を被覆した触媒担体において、該触媒担体表面に、多
価金属塩および高分子凝集剤のうちの少なくとも１種を
担体重量の０．０１〜３ｗｔ％の範囲で含浸または塗布
したことを特徴とする。(Means for solving the problem) The above purpose is to impregnate or coat the carrier before coating with the catalyst support layer with a substance that has an aggregating effect such as aluminum nitrate, so that the coating slurry has an aggregating effect on the surface of the carrier. This is achieved by That is, the present invention provides a catalyst carrier in which the surface of the catalyst carrier is coated with a ceramic catalyst supporting layer having a high specific surface area, in which at least one of a polyvalent metal salt and a polymer flocculant is applied to the surface of the catalyst carrier in an amount corresponding to the weight of the carrier. It is characterized by being impregnated or coated in a range of 0.01 to 3 wt%.
本発明において、触媒担体がハニカム形状を有し、多価
金属塩が硝酸アルミニウム、塩化アルミニウム、塩化カ
ルシウムおよび硫酸カルシウムのうちの少なくとも１種
の化合物であることを特徴とする触媒燃焼用担体が好ま
しい。In the present invention, a carrier for catalytic combustion is preferred, in which the catalyst carrier has a honeycomb shape, and the polyvalent metal salt is at least one compound selected from aluminum nitrate, aluminum chloride, calcium chloride, and calcium sulfate. .
（作用）
触媒担体に、コーティングの前処理としてコーティング
スラリに対し凝集作用を有する物質を担体表面に付着さ
せることにより、コーティングの際、担体表面と接した
コーティングスラリをＵＳさせ、触媒の担体表面への付
着を容易にするため、触媒担持層を形成するコーテイン
グ材の濃度が低い希薄なスラリを用いても所定量の触媒
担持層が被覆され、担体への触媒担持層が均一になる。(Function) By attaching a substance that has an aggregating effect to the coating slurry to the surface of the catalyst carrier as a pretreatment for coating, the coating slurry that is in contact with the carrier surface is applied to the catalyst carrier surface during coating. In order to facilitate the adhesion of the catalyst, even if a dilute slurry with a low concentration of the coating material forming the catalyst support layer is used, a predetermined amount of the catalyst support layer can be coated, and the catalyst support layer can be uniformly applied to the carrier.
以下、本発明をハニカム担体を代表例として説明するが
、他の同様な触媒形状にも本発明は適用可能である。The present invention will be explained below using a honeycomb carrier as a representative example, but the present invention is also applicable to other similar catalyst shapes.
（実施例）
第１図は、触媒燃焼用コーディエライト質ハニカム担体
の形状を示したもので、外形は１４０×１５０Ｘ２０
（龍）、セル形状は１．４龍角である。(Example) Fig. 1 shows the shape of a cordierite honeycomb carrier for catalytic combustion, and the external size is 140 x 150 x 20.
(Dragon), the cell shape is 1.4 Dragon angle.
このような形状のハニカム触媒の製造工程を第２図に示
す。The manufacturing process of a honeycomb catalyst having such a shape is shown in FIG. 2.
最初に上記ハニカムを洗浄、脱脂および乾燥した後、２
％硝酸アルミニウム水溶液を含浸し、再度乾燥させた後
、含浸前後の重量変化により硝酸アルミニウムの含浸量
を測定したところ、ハニカム旧体重量の約０．０７ Ｗ
ｔ％であった。この処理後、第１表に示した組成を有
するＢａ−βＡｚ２０３スラリ中に３分間浸漬した。表
中のリン酸アルミニウムおよびポリビニルアルコールは
それぞれ無機および有機結合剤である。コーティングし
たハニカムは１００℃で通風乾燥し、充分に水分を除い
た後、８００℃で２時間焼成を行なった。After first cleaning, degreasing and drying the honeycomb, 2
% aluminum nitrate aqueous solution and drying again, the amount of aluminum nitrate impregnated was measured by the weight change before and after impregnation, and it was found that the weight of the old honeycomb was about 0.07 W.
It was t%. After this treatment, it was immersed in Ba-βAz203 slurry having the composition shown in Table 1 for 3 minutes. Aluminum phosphate and polyvinyl alcohol in the table are inorganic and organic binders, respectively. The coated honeycomb was dried with ventilation at 100°C to sufficiently remove moisture, and then fired at 800°C for 2 hours.
第 １ 表
コーティングする触媒担持層の材料としては、１５ｍ／
ｇの高圧表面積と１４００℃の耐熱性を有する、第３図
に示す粒径分布のＢａ−βＡｌ２Ｏ３を用いた。コーテ
ィングスラリ中のＢａ−βＡｘ２ｏ３含有量は多いほど
、担体への付着量が多くなり、触媒活性や製造工程の簡
略化の点で有利であるが、１回のコーティングで付着す
るＢａ−βＡｘ２０３の量が多いと担体への均一な被覆
が困難であり、担体のセルが閉塞し易いので、実用的に
は５〜２０ｗｔ％のスラリ濃度が好適である。Table 1 The material for the catalyst support layer to be coated is 15m/
Ba-βAl2O3 having a high-pressure surface area of 1,400 g and a heat resistance of 1,400 DEG C. and having a particle size distribution shown in FIG. 3 was used. The higher the Ba-βAx2O3 content in the coating slurry, the more the amount of Ba-βAx2O3 that adheres to the carrier increases, which is advantageous in terms of catalyst activity and simplification of the manufacturing process, but the amount of Ba-βAx2O3 that adheres in one coating is If it is too large, it is difficult to uniformly coat the carrier and the cells of the carrier are likely to be clogged, so a slurry concentration of 5 to 20 wt% is practically preferred.
ハニカム担体に含浸する凝集剤としては、硝酸アルミニ
ウム、塩化アルミニウムなどのアルミニウム塩、塩化カ
ルシウム、硫酸カルシウムなどのカルシウム塩や高分子
凝集剤を用いられるが、触媒に対し無害なアルミナを形
成する硝酸アルミニウムなどのアルミニウム塩が好まし
い。なお触媒担持層のＢａ−βＡｌ２Ｏ３と低融点化合
物を形成したり、耐熱性の低下を生じ易いカルシウム塩
や触媒であるＰｄの活性低下を招くおそれがある塩化物
は避けたほうがよい。As the flocculant impregnated into the honeycomb carrier, aluminum salts such as aluminum nitrate and aluminum chloride, calcium salts such as calcium chloride and calcium sulfate, and polymer flocculants are used, but aluminum nitrate forms alumina that is harmless to the catalyst. Aluminum salts such as are preferred. Note that it is better to avoid calcium salts that form low melting point compounds with Ba-βAl2O3 in the catalyst support layer or that tend to cause a decrease in heat resistance, and chlorides that may cause a decrease in the activity of Pd, which is a catalyst.
第４図は、ハニカム担体に対する硝酸アルミニウムの含
浸量と触媒担持層の付着量の関係を示すものであるが、
含？ｆｆｆ１０．０２ ｗ ｔ％以下では特に効果が認
められないが、１．５ ｗ ｔ％以上ではコーティング
スラリの含浸中に担体壁から凝集剤が過剰に溶出するた
め、セル中でスラリか凝築し、セルの閉塞を生じる。す
なわち凝集剤の硝酸アルミニウムの担体への含浸量は、
０．０２ Ｗ ｔ％から１゜５ｗｔ％の範囲が好適であ
る。FIG. 4 shows the relationship between the amount of aluminum nitrate impregnated into the honeycomb carrier and the amount of the catalyst support layer attached.
Including? fff No particular effect is observed at 10.02 wt% or less, but at 1.5 wt% or more, the flocculant is excessively eluted from the carrier wall during impregnation with the coating slurry, causing the slurry to coagulate in the cell. , resulting in cell occlusion. In other words, the amount of flocculant impregnated into the carrier of aluminum nitrate is:
A range of 0.02 Wt% to 1.5 wt% is preferred.
ハニカム担体に凝集剤として硝酸アルミニウム０、１２
Ｗ ｔ％全含浸せたものを用い、これに１０ｗｔ％の
Ｂａ−βＡｌ２Ｏ３に前述の有機および無機結合剤を添
加したコーティングスラリをコーテイング後、焼成した
。得られたハニカム担体のｌ３ａ−βＡｌ２Ｏ３の付着
量はハニカム上の各部で±３％程度の偏差であった。な
お、従来型では１１２％の偏差を生じた。さらにこのハ
ニカムにＰｄ触媒を含浸した後、長時間の燃焼試験を行
ない燃焼率を検討したが、担体上の触媒濃度が均一にな
るため第６図に示すように従来型より約３０％程度長寿
命を有していることが分った。Aluminum nitrate 0,12 as flocculant in honeycomb carrier
Using a material completely impregnated with Wt%, it was coated with a coating slurry containing 10wt% Ba-βAl2O3 and the above-mentioned organic and inorganic binders, and then fired. The amount of l3a-βAl2O3 deposited on the obtained honeycomb carrier had a deviation of about ±3% at each part on the honeycomb. Note that in the conventional type, a deviation of 112% occurred. Furthermore, after impregnating this honeycomb with a Pd catalyst, we conducted a long-term combustion test to examine the combustion rate.As shown in Figure 6, the length of the honeycomb was about 30% longer than that of the conventional type because the catalyst concentration on the carrier was uniform. It was found that it has a long lifespan.
（発明の効果）
本発明によれば、触媒燃焼用担体に触媒担持層を均一に
被覆できるので、担体上の燃焼触媒濃度が均一になり、
燃焼むらによる熱応力の発生や局部的過熱による触媒の
活性低下を防止し、燃焼触媒の長寿命化を達成すること
ができる。(Effects of the Invention) According to the present invention, the catalyst support layer can be uniformly coated on the catalytic combustion carrier, so that the combustion catalyst concentration on the carrier becomes uniform.
It is possible to prevent the occurrence of thermal stress due to uneven combustion and a decrease in catalyst activity due to local overheating, thereby achieving a longer life of the combustion catalyst.
第１図は、本発明になる触媒燃焼用ハニカムに用いたコ
ーディエライト質ハニカム担体の寸法、形伏を示した図
、第２図は、本実施例になる触媒燃焼用ハニカムの製造
工程を示した図、第３図は、本実施例で用いたコーティ
ングスラリのＢａ−βＡｘ２ ｏ３の粒度分布を示した
図、第４図は、ハニカム担体への触媒担持層の付着量に
及ぼす硝酸アルミニウムの担体含浸量の影響を示した図
、第５図は、従来型のハニカムの触媒担持層の付着量の
分布を示した図、第６図は、従来型のハニカムと本実施
例になるハニカムの長時間燃焼における燃焼率の変化を
示した図である。
代理人 弁理士 川 北 武 長
第３図
粒径（、ｕｍ）
第４図Fig. 1 shows the dimensions and shape of the cordierite honeycomb carrier used in the honeycomb for catalytic combustion according to the present invention, and Fig. 2 shows the manufacturing process for the honeycomb for catalytic combustion according to the present embodiment. Figure 3 shows the particle size distribution of Ba-βAx2o3 in the coating slurry used in this example, and Figure 4 shows the effect of aluminum nitrate on the amount of catalyst support layer deposited on the honeycomb carrier. Figure 5 is a diagram showing the influence of the amount of carrier impregnated, Figure 5 is a diagram showing the distribution of the amount of adhesion of the catalyst support layer of a conventional honeycomb, and Figure 6 is a diagram showing the influence of the amount of carrier impregnation. FIG. 3 is a diagram showing changes in combustion rate during long-term combustion. Agent Patent Attorney Takeshi Kawakita Figure 3 Particle size (, um) Figure 4
Claims (2)
持層を被覆した触媒担体において、該触媒担体表面に、
多価金属塩および高分子凝集剤のうちの少なくとも１種
を担体重量の０．０１〜３ｗｔ％の範囲で含浸または塗
布したことを特徴とする触媒燃焼用担体。(1) In a catalyst carrier in which the surface of the catalyst carrier is coated with a ceramic catalyst supporting layer having a high specific surface area, the surface of the catalyst carrier is
A carrier for catalytic combustion, characterized in that it is impregnated or coated with at least one of a polyvalent metal salt and a polymer flocculant in an amount of 0.01 to 3 wt% of the carrier weight.
カム形状を有し、多価金属塩が硝酸アルミニウム、塩化
アルミニウム、塩化カルシウムおよび硫酸カルシウムの
うちの少なくとも１種の化合物であることを特徴とする
触媒燃焼用担体。(2) Claim 1 is characterized in that the catalyst carrier has a honeycomb shape, and the polyvalent metal salt is at least one compound selected from aluminum nitrate, aluminum chloride, calcium chloride, and calcium sulfate. A carrier for catalytic combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13310086A JPS62289237A (en) | 1986-06-09 | 1986-06-09 | Carrier for catalytic combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13310086A JPS62289237A (en) | 1986-06-09 | 1986-06-09 | Carrier for catalytic combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62289237A true JPS62289237A (en) | 1987-12-16 |
Family
ID=15096822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13310086A Pending JPS62289237A (en) | 1986-06-09 | 1986-06-09 | Carrier for catalytic combustion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62289237A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5281128A (en) * | 1990-11-26 | 1994-01-25 | Catalytica, Inc. | Multistage process for combusting fuel mixtures |
-
1986
- 1986-06-09 JP JP13310086A patent/JPS62289237A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5281128A (en) * | 1990-11-26 | 1994-01-25 | Catalytica, Inc. | Multistage process for combusting fuel mixtures |
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